TestCodecFactory.java
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上传日期:2018-01-08
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文件大小:5k
- /*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements. See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership. The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- package org.apache.hadoop.io.compress;
- import java.io.IOException;
- import java.io.InputStream;
- import java.io.OutputStream;
- import java.util.*;
- import junit.framework.TestCase;
- import org.apache.hadoop.fs.Path;
- import org.apache.hadoop.conf.Configuration;
- public class TestCodecFactory extends TestCase {
- private static class BaseCodec implements CompressionCodec {
- private Configuration conf;
-
- public void setConf(Configuration conf) {
- this.conf = conf;
- }
-
- public Configuration getConf() {
- return conf;
- }
-
- public CompressionOutputStream createOutputStream(OutputStream out)
- throws IOException {
- return null;
- }
-
- public Class<? extends Compressor> getCompressorType() {
- return null;
- }
- public Compressor createCompressor() {
- return null;
- }
- public CompressionInputStream createInputStream(InputStream in,
- Decompressor decompressor)
- throws IOException {
- return null;
- }
- public CompressionInputStream createInputStream(InputStream in)
- throws IOException {
- return null;
- }
- public CompressionOutputStream createOutputStream(OutputStream out,
- Compressor compressor)
- throws IOException {
- return null;
- }
- public Class<? extends Decompressor> getDecompressorType() {
- return null;
- }
- public Decompressor createDecompressor() {
- return null;
- }
- public String getDefaultExtension() {
- return ".base";
- }
- }
-
- private static class BarCodec extends BaseCodec {
- public String getDefaultExtension() {
- return "bar";
- }
- }
-
- private static class FooBarCodec extends BaseCodec {
- public String getDefaultExtension() {
- return ".foo.bar";
- }
- }
-
- private static class FooCodec extends BaseCodec {
- public String getDefaultExtension() {
- return ".foo";
- }
- }
-
- /**
- * Returns a factory for a given set of codecs
- * @param classes the codec classes to include
- * @return a new factory
- */
- private static CompressionCodecFactory setClasses(Class[] classes) {
- Configuration conf = new Configuration();
- CompressionCodecFactory.setCodecClasses(conf, Arrays.asList(classes));
- return new CompressionCodecFactory(conf);
- }
-
- private static void checkCodec(String msg,
- Class expected, CompressionCodec actual) {
- assertEquals(msg + " unexpected codec found",
- expected.getName(),
- actual.getClass().getName());
- }
-
- public static void testFinding() {
- CompressionCodecFactory factory =
- new CompressionCodecFactory(new Configuration());
- CompressionCodec codec = factory.getCodec(new Path("/tmp/foo.bar"));
- assertEquals("default factory foo codec", null, codec);
- codec = factory.getCodec(new Path("/tmp/foo.gz"));
- checkCodec("default factory for .gz", GzipCodec.class, codec);
- codec = factory.getCodec(new Path("/tmp/foo.bz2"));
- checkCodec("default factory for .bz2", BZip2Codec.class, codec);
- factory = setClasses(new Class[0]);
- codec = factory.getCodec(new Path("/tmp/foo.bar"));
- assertEquals("empty codec bar codec", null, codec);
- codec = factory.getCodec(new Path("/tmp/foo.gz"));
- assertEquals("empty codec gz codec", null, codec);
- codec = factory.getCodec(new Path("/tmp/foo.bz2"));
- assertEquals("default factory for .bz2", null, codec);
- factory = setClasses(new Class[]{BarCodec.class, FooCodec.class,
- FooBarCodec.class});
- codec = factory.getCodec(new Path("/tmp/.foo.bar.gz"));
- assertEquals("full factory gz codec", null, codec);
- codec = factory.getCodec(new Path("/tmp/foo.bz2"));
- assertEquals("default factory for .bz2", null, codec);
- codec = factory.getCodec(new Path("/tmp/foo.bar"));
- checkCodec("full factory bar codec", BarCodec.class, codec);
- codec = factory.getCodec(new Path("/tmp/foo/baz.foo.bar"));
- checkCodec("full factory foo bar codec", FooBarCodec.class, codec);
- codec = factory.getCodec(new Path("/tmp/foo.foo"));
- checkCodec("full factory foo codec", FooCodec.class, codec);
- }
- }